66532223566 has 8 divisors (see below), whose sum is σ = 99800219664. Its totient is φ = 33265483680.

The previous prime is 66532223561. The next prime is 66532223581.

66532223566 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66532223561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168075 + ... + 401638.

It is an arithmetic number, because the mean of its divisors is an integer number (12475027458).

Almost surely, 2^66532223566 is an apocalyptic number.

66532223566 is a deficient number, since it is larger than the sum of its proper divisors (33267996098).

66532223566 is a wasteful number, since it uses less digits than its factorization.

66532223566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628106.

The product of its digits is 2332800, while the sum is 46.

The spelling of 66532223566 in words is "sixty-six billion, five hundred thirty-two million, two hundred twenty-three thousand, five hundred sixty-six".